Sash-lock.



DI MI BASH LOCK.

APPLICATION TILED OUT. 1, 1998.

Patented Jan. 31, 1911.

HGL

INVENTORI MIX/EL mad/m,

UNITED STATES PATENT OFFICE.

DANIEL M. BARR, OF PHILADELPHIA, PENNSYLVANIA.

SASH-LOCK.

To all whom it may concern:

Be it known that I, DANIEL M. BARR, of Philadelphia, in the county ofPhiladelphia and State of Pennsylvania, have invented certain new anduseful Improvements in Sash-Locks, of which the following is aspecification, reference being had to the accompanying drawings.

My invention relates to an improvement in sash locks and has for itsobject the production of a gravity lock which shall be automatic inoperation, simple and durable in construction, and free from theunreliability of spring action.

The sash lock constructed according to my invention, comprises anover-weighted swing catch which is normally maintained by gravity in thepath of travel of a sash or similar closure thereby forming an abutmentto prevent its movement in one direction, yet capable of being swung toan inverted position, and there maintained by gravity, in such positionas to permit the travel of the sash in the opposite direction which whenso moved readjusts the overweighted catch so as to again becomeeffective when the sash is moved to its closed position.

In'the accompanying drawings, Figure I, is a vertical section throughthe upper and lower sashes of a window in closed position, convenientlyillustrating my invention as applied thereto. Fig. II, is a perspectiveview of the frame or supporting member of the lock. Fig. III, is aperspective view of the swinging member or bolt.

In said figures, 1, and 2, designate the upper and lower sashesrespectively of an ordinary window. To the upper face of the bottom rail3, of the upper sash 1, is fastened the plate 4, by means of screws 5,said plate carrying the lugs 6, and 7, which are integral therewith andsupport the pin 8, upon which the swinging bolt 9, is pivoted. Plate 4,is extended beyond each of the lugs 6, and 7, as indicated at 10, 10,these extremities being pierced by holes 11, for the insertion of screws5, by which the said plate 4, is secured to the sash rail.

The bolt 9, is in form a sectional prism hollow in one side, and islongitudinally pierced at its upper end by a hole 12, which receives thepin 8. In cross section said bolt 9, comprises a heavy vertical arm 13,over-weighted sufficiently to cause the pro- Specification of LettersPatent.

Application filed October 1, 1908.

Patented Jan. 31, 1911.

Serial No. 455,713.

jection of its lateral curved arm 15, beyond the inner face of thebottom rail 3, of the upper sash, to overhang the upper rail 20, of thelower sash when in closed position as clearly shown in Fig. I. Said rail20, of the lower sash 2, is faced at its top by a metallic plate 22,fastened by screws 23, and which is adapted to engage with the swingingbolt 9, when the sashes are locked.

To open the window, the bolt 9, is depressed and swung to the dottedposition shown in Fig. I, where it will be seen that the center ofgravity of the said bolt is to the left of the vertical, thus causingthe pin 25, to engage its stop 26, on the bearing bracket 6. \Vhen inthis last position, it will also be observed that the back of the boltnow serves as a cam face which projects into the path of the sash 2,whose upper rail 20, upon being raised encounters the said cam surfaceand shifts the bolt until its center of gravity is to the right of thevertical, whereupon, the bolt again drops to its original position afterthe rail 20, has passed it.

During the lowering of the sash 2, the under face of its upper rail 20,encounters the projecting inclined sides 16, and 17 of the bolt 9, whichis thereby depressed, and when the sash has finally been closed, againswings forward under the influence of gravity and projects above theplate 22, on the rail 20, of the said sash, thereby automaticallylocking the latter.

By the arrangement of the parts just described it is impossible to openthe window from the outside, and on account of their simplicity there isabsolutely no possibility of their derangement to prevent automaticlocking.

Having thus described my invention, 1

' claim 1. A sash lock comprising a swinging catch mounted in proximityto the meeting rail of a sash and over-weighted sufficiently to normallycause it to form an abutment for locking said sash against movement inone direction, means for pivotally supporting said catch, in combinationwith means adapted to enact with gravity to maintain the said catch ininverted position during the initial opening of the said sash, theopeniug of the sash operating to return said catch to normal lockingposition, whereby when the sash is lowered, it will be automaticallylocked.

2. A sash look, comprising an over- Weighted pivoted catch normallyprojecting under the influence of gravity to form an abutment forlooking a sash against movement in one direction; means adapted to 00-act with gravity to maintain said catch in inverted position during theinitial opening of the sash; and means carried by said sash adapted toengage the catch as the Window is opened to destroy its stability, Whenin inverted position and thereby permit gravity to readjust said catchin readinessto lock the sash automatically upon its closing.

In testimony whereof, I have hereunto I signed my name, at Philadelphia,Pennsylvania, this twenty-ninth day of September 1908.

DANIEL M. BARR.

\Vitnesses JAMES H. BELL, E. L. FULLERTON.

